dispose method

@override void dispose()

Releases everything this controller owns. The page that created the controller calls this from its own State.dispose(); a subclass that adds its own notifiers overrides this and ends with super.dispose().

Implementation

@override
void dispose() {
  firstNameController.dispose();
  lastNameController.dispose();
  userNameController.dispose();
  passwordController.dispose();
  phoneController.dispose();
  shiftTitleController.dispose();
  super.dispose();
}